Charging a 2026 Rivian R1S Quad Max (20in AT) at home in Washington

At Washington's residential electricity rate of 14.35¢/kWh, a 2026 Rivian R1S Quad Max (20in AT) (rated 50.1 kWh per 100 miles by the EPA) costs $7.19 to drive 100 miles on home charging, against $16.02 for the same distance in a car averaging 25.5 mpg on gasoline at $4.085/gallon. That works out to 55.1% cheaper per mile than gasoline in Washington — charging at home is much cheaper than gas here.

2026 Rivian R1S Quad Max (20in AT): yearly cost in Washington

Washington owners putting 15,000 annual miles on a 2026 Rivian R1S Quad Max (20in AT) spend about $1,078 on home electricity, compared to about $2,403 a gas-car equivalent would spend on fuel. Call it about $1,324 saved annually, at this mileage.

Cost of a full charge

At Washington's rate, fully covering this 2026 Rivian R1S Quad Max (20in AT)'s 325-mile EPA range costs about $23.37 (162.8 kWh) — the energy the EPA test actually used, not the battery's rated size.

How this compares nationally

Among all 20,400 state-and-model combinations this site tracks, charging a 2026 Rivian R1S Quad Max (20in AT) in Washington ranks 13,575 for cost savings versus gas — 1 being the best deal nationally. Separately, the Rivian R1S Quad Max (20in AT) ranks 392 of 400 EV models for raw efficiency, and Washington ranks 15 of 51 for cheapest residential electricity.

Next step: home charger installation

Everything above is the per-mile and per-year cost once a home charger exists — getting one installed is a separate electrical job whose price depends on your panel and wiring, not the state average used here.

Get quotes from local electricians for Level 2 charger installation in Washington before deciding.

More on how this number was built

Every figure on this page traces to a named EIA or EPA dataset — see the methodology guide. Washington's 14.35¢/kWh rate ranks 15 of 51 states; the state rate guide lays out the full spread.